/*
 * Copyright 2012 Sebastian Annies, Hamburg
 *
 * Licensed under the Apache License, Version 2.0 (the License);
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an AS IS BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.googlecode.mp4parser.authoring;

import java.util.Date;

/**
 * Converts ISO Dates (seconds since 1/1/1904) to Date and vice versa.
 */
public class DateHelper {
  /**
   * Converts a long value with seconds since 1/1/1904 to Date.
   *
   * @param secondsSince seconds since 1/1/1904
   * @return date the corresponding <code>Date</code>
   */
  static public Date convert(long secondsSince) {
    return new Date((secondsSince - 2082844800L) * 1000L);
  }


  /**
   * Converts a date as long to a mac date as long
   *
   * @param date date to convert
   * @return date in mac format
   */
  static public long convert(Date date) {
    return (date.getTime() / 1000L) + 2082844800L;
  }
}
